1Made of high quality plastic material, more strong and durable. 2The air output can be adjusted by itself, with simple operation but more energysaving. 3With soft shock absorption silica gel pad, it can assimilate more sound, reduce air pump friction, the noise is very low. 4It can be used without other facilitating tools. With easy disassembly and convenient for cleaning and maintenance. 5It is a ultra silent pump. It works with very little noise, making you comfortable to use.